From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f200.google.com (mail-pf0-f200.google.com [209.85.192.200]) by kanga.kvack.org (Postfix) with ESMTP id E3B866B02C4 for ; Mon, 24 Apr 2017 09:03:35 -0400 (EDT) Received: by mail-pf0-f200.google.com with SMTP id 194so11787762pfv.11 for ; Mon, 24 Apr 2017 06:03:35 -0700 (PDT) Received: from mga04.intel.com (mga04.intel.com. [192.55.52.120]) by mx.google.com with ESMTPS id b1si18912530plc.191.2017.04.24.06.03.34 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 24 Apr 2017 06:03:35 -0700 (PDT) Date: Mon, 24 Apr 2017 06:03:11 -0700 From: Andi Kleen Subject: Re: Question on the five-level page table support patches Message-ID: <20170424130311.GR4021@tassilo.jf.intel.com> References: <030ea57b-5f6c-13d8-02f7-b245a754a87d@physik.fu-berlin.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Andy Lutomirski Cc: John Paul Adrian Glaubitz , "Kirill A. Shutemov" , "linux-kernel@vger.kernel.org" , Dave Hansen , Michal Hocko , linux-arch , "linux-mm@kvack.org" > Can you explain what the issue is? What used to work on Linux and > doesn't any more? The man page is quite clear: In old Linux hint was a search hint, so if there isn't a hole at the hinted area it will search starting from there for a hole instead of giving up immediately. Now it just gives up, which means every user has to implement their own search. Yes I ran into the same problem and it's annoying. It broke originally when top down mmap was added I believe Before the augmented rbtree it was potentially very expensive, but now it should be cheap. -Andi -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org